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description Publicationkeyboard_double_arrow_right Article 2022 Norway, United States, GermanyPublisher:Springer Science and Business Media LLC Melaniuk, Katarzyna; Sztybor, Kamila; Treude, Tina; Sommer, Stefan; Rasmussen, Tine Lander;AbstractFossil benthic foraminifera are used to trace past methane release linked to climate change. However, it is still debated whether isotopic signatures of living foraminifera from methane-charged sediments reflect incorporation of methane-derived carbon. A deeper understanding of isotopic signatures of living benthic foraminifera from methane-rich environments will help to improve reconstructions of methane release in the past and better predict the impact of future climate warming on methane seepage. Here, we present isotopic signatures (δ13C and δ18O) of foraminiferal calcite together with biogeochemical data from Arctic seep environments from c. 1200 m water depth, Vestnesa Ridge, 79° N, Fram Strait. Lowest δ13C values were recorded in shells of Melonis barleeanus, − 5.2‰ in live specimens and − 6.5‰ in empty shells, from sediments dominated by aerobic (MOx) and anaerobic oxidation of methane (AOM), respectively. Our data indicate that foraminifera actively incorporate methane-derived carbon when living in sediments with moderate seepage activity, while in sediments with high seepage activity the poisonous sulfidic environment leads to death of the foraminifera and an overgrowth of their empty shells by methane-derived authigenic carbonates. We propose that the incorporation of methane-derived carbon in living foraminifera occurs via feeding on methanotrophic bacteria and/or incorporation of ambient dissolved inorganic carbon.
Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2022Full-Text: http://europepmc.org/articles/PMC8782907Data sources: PubMed CentralMunin - Open Research Archive; Norwegian Open Research ArchivesArticle . 2022 . Peer-reviewedeScholarship - University of CaliforniaArticle . 2022Data sources: eScholarship - University of CaliforniaAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1038/s41598-022-05175-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 9 citations 9 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2022Full-Text: http://europepmc.org/articles/PMC8782907Data sources: PubMed CentralMunin - Open Research Archive; Norwegian Open Research ArchivesArticle . 2022 . Peer-reviewedeScholarship - University of CaliforniaArticle . 2022Data sources: eScholarship - University of CaliforniaAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1038/s41598-022-05175-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2018 Denmark, Ireland, France, Finland, Germany, France, Norway, United States, Norway, France, France, Germany, France EnglishPublisher:Karlsruhe Publicly fundedFunded by:EC | INTAROS, NSF | METHANE AT THE ZERO CURTA..., NSF | Methane loss from Arctic:... +1 projectsEC| INTAROS ,NSF| METHANE AT THE ZERO CURTAIN ,NSF| Methane loss from Arctic: towards an annual budget of CH4 emissions from tundra ecosystems across a latitudinal gradient ,EC| IMBALANCE-PQiu, C.; Zhu, D.; Ciais, P.; Guenet, B.; Krinner, G.; Peng, S.; Aurela, M.; Bernhofer, C.; Bruemmer, C.; Bret-Harte, S.; Chu, H.; Chen, J.; Desai, A.R.; Dusek, J.; Euskirchen, E.S.; Fortuniak, K.; Flanagan, L.B.; Friborg, T.; Grygoruk, M.; Gogo, S.; Gruenwald, T.; Hansen, B.U.; Holl, D.; Humphreys, E.; Hurkuck, M.; Kiely, G.; Klatt, J.; Kutzbach, L.; Largeron, C.; Laggoun-Defarge, F.; Lund, M.; Lafleur, P.M.; Li, X.; Mammarella, I.; Merbold, L.; Nilsson, M.B.; Olejnik, J.; Ottosson-Lofvenius, M.; Oechel, W.; Parmentier, F.-J.W.; Peichl, M.; Pirk, N.; Peltola, O.; Pawlak, W.; Rasse, D.; Rinne, J.; Shaver, G.; Schmid, H.P.; Sottocornola, M.; Steinbrecher, R.; Sachs, T.; Urbaniak, M.; Zona, D.; Ziemblinska, K.;handle: 11250/2499167 , 10037/13756 , 10468/5590 , 10138/232954 , 10852/64962
Peatlands store substantial amounts of carbon and are vulnerable to climate change. We present a modified version of the Organising Carbon and Hydrology In Dynamic Ecosystems (ORCHIDEE) land surface model for simulating the hydrology, surface energy, and CO2 fluxes of peatlands on daily to annual timescales. The model includes a separate soil tile in each 0.5° grid cell, defined from a global peatland map and identified with peat-specific soil hydraulic properties. Runoff from non-peat vegetation within a grid cell containing a fraction of peat is routed to this peat soil tile, which maintains shallow water tables. The water table position separates oxic from anoxic decomposition. The model was evaluated against eddy-covariance (EC) observations from 30 northern peatland sites, with the maximum rate of carboxylation (Vcmax) being optimized at each site. Regarding short-term day-to-day variations, the model performance was good for gross primary production (GPP) (r2 = 0.76; Nash–Sutcliffe modeling efficiency, MEF = 0.76) and ecosystem respiration (ER, r2 = 0.78, MEF = 0.75), with lesser accuracy for latent heat fluxes (LE, r2 = 0.42, MEF = 0.14) and and net ecosystem CO2 exchange (NEE, r2 = 0.38, MEF = 0.26). Seasonal variations in GPP, ER, NEE, and energy fluxes on monthly scales showed moderate to high r2 values (0.57–0.86). For spatial across-site gradients of annual mean GPP, ER, NEE, and LE, r2 values of 0.93, 0.89, 0.27, and 0.71 were achieved, respectively. Water table (WT) variation was not well predicted (r2 cmax and latitude (temperature), which better reflects the spatial gradients of annual NEE than using an average Vcmax value. Source at https://doi.org/10.5194/gmd-11-497-2018.
Norwegian Open Resea... arrow_drop_down GFZ German Research Centre for GeosciencesArticle . 2018Data sources: GFZ German Research Centre for GeoscienceseScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaGFZ German Research Centre for GeosciencesArticle . 2018Data sources: GFZ German Research Centre for GeosciencesCork Open Research Archive (CORA)Article . 2018License: CC BYData sources: Cork Open Research Archive (CORA)Geoscientific Model Development (GMD)Other literature type . 2018Data sources: Copernicus PublicationsCopenhagen University Research Information SystemArticle . 2018Data sources: Copenhagen University Research Information SystemMunin - Open Research Archive; Norwegian Open Research ArchivesArticle . 2018 . Peer-reviewedNorwegian Open Research Archives; NIBIO BrageArticle . 2018HELDA - Digital Repository of the University of HelsinkiArticle . 2018 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiHAL AMU; Hal-DiderotArticle . 2018All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5445/ir/1000083904&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 6visibility views 6 download downloads 38 Powered bymore_vert Norwegian Open Resea... arrow_drop_down GFZ German Research Centre for GeosciencesArticle . 2018Data sources: GFZ German Research Centre for GeoscienceseScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaGFZ German Research Centre for GeosciencesArticle . 2018Data sources: GFZ German Research Centre for GeosciencesCork Open Research Archive (CORA)Article . 2018License: CC BYData sources: Cork Open Research Archive (CORA)Geoscientific Model Development (GMD)Other literature type . 2018Data sources: Copernicus PublicationsCopenhagen University Research Information SystemArticle . 2018Data sources: Copenhagen University Research Information SystemMunin - Open Research Archive; Norwegian Open Research ArchivesArticle . 2018 . Peer-reviewedNorwegian Open Research Archives; NIBIO BrageArticle . 2018HELDA - Digital Repository of the University of HelsinkiArticle . 2018 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiHAL AMU; Hal-DiderotArticle . 2018All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5445/ir/1000083904&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2020 United States, United Kingdom, NorwayPublisher:American Geophysical Union (AGU) Funded by:SNSF | The role of Southern Ocea..., NSF | Southern Ocean Carbon and..., SNSF | The role of Southern Ocea...SNSF| The role of Southern Ocean stratification in future ocean CO2 and heat uptake ,NSF| Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) ,SNSF| The role of Southern Ocean stratification in future ocean CO2 and heat uptakeF. Alexander Haumann; Ruth Moorman; Stephen C. Riser; Lars Henrik Smedsrud; Ted Maksym; Annie P. S. Wong; Earle A. Wilson; Robert Drucker; Lynne D. Talley; Kenneth S. Johnson; R.M. Key; Jorge L. Sarmiento;handle: 11250/2761620
<p>In cold polar waters, temperatures sometimes drop below the freezing point, a process referred to as supercooling. However, observational challenges in polar regions limit our understanding of the spatial and temporal extent of this phenomenon. We here provide observational evidence that supercooled waters are much more widespread in the seasonally ice-covered Southern Ocean than previously reported. In 5.8% of all analyzed hydrographic profiles south of 55&#176; S, we find temperatures below the surface freezing point (&#8216;potential&#8217; supercooling), and half of these have temperatures below the local freezing point (&#8216;in-situ&#8217; supercooling). Their occurrence doubles when neglecting measurement uncertainties. We attribute deep coastal-ocean supercooling to melting of Antarctic ice shelves, and surface-induced supercooling in the seasonal sea-ice region to winter-time sea-ice formation. The latter supercooling type can extend down to the permanent pycnocline due to convective sinking plumes&#8212;an important mechanism for vertical tracer transport and water-mass structure in the polar ocean.</p>
Caltech Authors arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedLicense: CC BYAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2020gl090242&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 13 citations 13 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 7visibility views 7 download downloads 5 Powered bymore_vert Caltech Authors arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedLicense: CC BYAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2020gl090242&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type 2020 FrancePublisher:Cold Spring Harbor Laboratory Thomas H A Haverkamp; Julien Lossouarn; Olga Zhaxybayeva; Jie Lyu; Nadège Bienvenu; Claire Geslin; Camilla L. Nesbø;SummaryPhylogenomic analyses of bacteria from the phylum Thermotogota have shown extensive lateral gene transfer with distantly related organisms, particularly with Firmicutes. One likely mechanism of such DNA transfer is viruses. However, to date, only three temperate viruses have been characterized in this phylum, all infecting bacteria from the Marinitoga genus. Here we report 17 proviruses integrated into genomes of bacteria belonging to eight Thermotogota genera and induce viral particle production from one of the proviruses. All except an incomplete provirus from Mesotoga fall into two groups based on sequence similarity, gene synteny and taxonomic classification. Proviruses of Group 1 are found in the genera Geotoga, Kosmotoga, Marinitoga, Thermosipho and Mesoaciditoga and are similar to the previously characterized Marinitoga viruses, while proviruses from Group 2 are distantly related to the Group 1 proviruses, have different genome organization and are found in Petrotoga and Defluviitoga. Genes carried by both groups are closely related to Firmicutes and Firmicutes (pro)viruses in phylogenetic analyses. Moreover, one of the groups show evidence of recent gene exchange and may be capable of infecting cells from both phyla. We hypothesize that viruses are responsible for a large portion of the observed gene flow between Firmicutes and Thermotogota.
Norwegian Open Resea... arrow_drop_down Environmental Microbiology; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedLicense: Wiley Online Library User AgreementEnvironmental Microbiology; ArchiMer - Institutional Archive of IfremerOther literature type . Article . 2021License: CC BY NC NDArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1101/2020.11.07.368316&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routeshybrid 3 citations 3 popularity Average influence Average impulse Average Powered by BIP!more_vert Norwegian Open Resea... arrow_drop_down Environmental Microbiology; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedLicense: Wiley Online Library User AgreementEnvironmental Microbiology; ArchiMer - Institutional Archive of IfremerOther literature type . Article . 2021License: CC BY NC NDArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1101/2020.11.07.368316&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2016 NorwayPublisher:University of California Press Funded by:EC | NACLIMEC| NACLIMPacariz, Selma V.; Hátún, Hjálmar; Jacobsen, Jan Arge; Johnson, Clare; Eliasen, Solva; Rey, Francisco;handle: 11250/2433361 , 10852/53073
Abstract The Northeast Atlantic mackerel (Scomber scombrus) stock has increased and expanded its summer feeding migration west- and northwards since 2006, entailing large geopolitical challenges for the countries harvesting this species. A common perspective is that climatic warming opens up new regions for biota in the north. It has also been suggested that the presently large pelagic fish stocks deplete prey resources in the eastern North Atlantic during their summer feeding phase, forcing the stocks west towards the Irminger Sea in their search for food. Here, we suggest that the declining nutrient (silicate) concentrations observed along the northern European continental slope reduce primary and thus secondary production, exacerbating food scarceness in the east and adding to the incentive to migrate westward. The new westward feeding route requires that the fish cross the Iceland Basin, which during the summer season quickly becomes nutrient-depleted and thus might act as a barrier to migration after the spring bloom. Using mackerel and zooplankton abundance data from the International Ecosystem Summer Surveys in the Nordic Seas, we suggest that the oligotrophic waters in the central Iceland Basin force the fish to migrate through a narrow ‘corridor’ along the south Iceland shelf, where nutrients are replenished and both primary and secondary production are higher.
Norwegian Open Resea... arrow_drop_down Elementa: Science of the AnthropoceneArticle . 2016Data sources: Elementa: Science of the AnthropoceneElementa: Science of the Anthropocene; Norwegian Open Research ArchivesArticle . 2016 . Peer-reviewedBrage IMR; Norwegian Open Research ArchivesArticle . 2016All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.12952/journal.elementa.000105&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 16 citations 16 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert Norwegian Open Resea... arrow_drop_down Elementa: Science of the AnthropoceneArticle . 2016Data sources: Elementa: Science of the AnthropoceneElementa: Science of the Anthropocene; Norwegian Open Research ArchivesArticle . 2016 . Peer-reviewedBrage IMR; Norwegian Open Research ArchivesArticle . 2016All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.12952/journal.elementa.000105&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2019 NorwayPublisher:American Geophysical Union (AGU) Authors: Willem G.M. van der Bilt; William J. D'Andrea; Johannes P. Werner; Jostein Bakke;Willem G.M. van der Bilt; William J. D'Andrea; Johannes P. Werner; Jostein Bakke;doi: 10.1029/2019gl084384
handle: 11250/2728059
AbstractArctic climate is uniquely sensitive to ongoing warming. The feedbacks that drive this amplified response remain insufficiently quantified and misrepresented in model scenarios of future warming. Comparison with paleotemperature reconstructions from past warm intervals can help close this gap. The Early Holocene (11.7–8.2 ka BP) is an important target because Arctic temperatures were warmer than today. This study presents centennially resolved summer temperature reconstructions from three Svalbard lakes. We show that Early Holocene temperatures fluctuated between the coldest and warmest extremes of the past 12 ka, exceeding the range of instrumental observations and future projections. Peak warmth occurred ~10 ka BP, with temperatures 7 °C warmer than today due to high radiative forcing and intensified inflow of warm Atlantic waters. Between 9.5 and 8 ka BP, temperatures dropped in response to freshwater fluxes from melting ice. Facing similar mechanisms, our findings may provide insight into the near‐future response of Arctic climate.
Geophysical Research... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2019 . Peer-reviewedLicense: CC BYAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2019gl084384&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 6 citations 6 popularity Top 10% influence Average impulse Average Powered by BIP!more_vert Geophysical Research... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2019 . Peer-reviewedLicense: CC BYAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2019gl084384&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2014 NorwayPublisher:Wiley Funded by:EC | EURO-BASINEC| EURO-BASINSmolina, I.; Kollias, S.; Poortvliet, M.; Nielsen, Torkel Gissel; Lindeque, P.; Castellani, C.; Møller, Eva Friis; Blanco-Bercial, L.; Hoarau, G.;This is the pre-peer reviewed version of the following article: Smolina, I., Kollias, S., Poortvliet, M., Nielsen, T.G., Lindeque, P., Castellani, C., ... Hoarau, G.G. (2014). Genome- and transcriptome-assisted development of nuclear insertion/deletion markers for Calanus species (Copepoda: Calanoida) identification. Molecular Ecology Resources, 14(5), 1072-1079, which has been published in final form at http://dx.doi.org/10.1111/1755-0998.12241. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-820227.html). Submitted version (preprint).
Nord Open Research A... arrow_drop_down Nord Open Research Archive; Norwegian Open Research ArchivesArticle . 2014Molecular Ecology Resources; ZENODOArticle . 2014 . Peer-reviewedLicense: Wiley Online Library User AgreementAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/1755-0998.12241&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 34 citations 34 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!visibility 40visibility views 40 download downloads 125 Powered bymore_vert Nord Open Research A... arrow_drop_down Nord Open Research Archive; Norwegian Open Research ArchivesArticle . 2014Molecular Ecology Resources; ZENODOArticle . 2014 . Peer-reviewedLicense: Wiley Online Library User AgreementAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/1755-0998.12241&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type 2020 Germany, Norway, Belgium, Netherlands, Norway, Denmark, NorwayPublisher:Copernicus GmbH Funded by:EC | PROTECT, NWO | Perturbations of System E...EC| PROTECT ,NWO| Perturbations of System Earth: Reading the Past to Project the Future - A proposal to create the Netherlands Earth System Science Centre (ESSC)Fettweis, Xavier; Hofer, Stefan; Krebs-Kanzow, Uta; Amory, Charles; Aoki, Teruo; Berends, Constantijn J.; Born, Andreas; Box, Jason E.; Delhasse, Alison; Fujita, Koji; Gierz, Paul; Goelzer, Heiko; Hanna, Edward; Hashimoto, Akihiro; Huybrechts, Philippe; Kapsch, Marie-Luise; King, Michalea D.; Kittel, Christoph; Lang, Charlotte; Langen, Peter L.; Lenaerts, Jan T. M.; Liston, Glen E.; Lohmann, Gerrit; Mernild, Sebastian H.; Mikolajewicz, Uwe; Modali, Kameswarrao; Mottram, Ruth H.; Niwano, Masashi; Noël, Brice; Ryan, Jonathan C.; Smith, Amy; Streffing, Jan; Tedesco, Marco; van de Berg, Willem Jan; van den Broeke, Michiel; van de Wal, Roderik S. W.; van Kampenhout, Leo; Wilton, David; Wouters, Bert; Ziemen, Florian; Zolles, Tobias;doi: 10.5194/tc-2019-321
Abstract. The Greenland Ice Sheet (GrIS) mass loss has been accelerating at a rate of about 20 ± 10 Gt/yr2 since the end of the 1990's, with around 60 % of this mass loss directly attributed to enhanced surface meltwater runoff. However, in the climate and glaciology communities, different approaches exist on how to model the different surface mass balance (SMB) components using: (1) complex physically-based climate models which are computationally expensive; (2) intermediate complexity energy balance models; (3) simple and fast positive degree day models which base their inferences on statistical principles and are computationally highly efficient. Additionally, many of these models compute the SMB components based on different spatial and temporal resolutions, with different forcing fields as well as different ice sheet topographies and extents, making inter-comparison difficult. In the GrIS SMB model intercomparison project (GrSMBMIP) we address these issues by forcing each model with the same data (i.e., the ERA-Interim reanalysis) except for two global models for which this forcing is limited to the oceanic conditions, and at the same time by interpolating all modelled results onto a common ice sheet mask at 1 km horizontal resolution for the common period 1980–2012. The SMB outputs from 13 models are then compared over the GrIS to (1) SMB estimates using a combination of gravimetric remote sensing data from GRACE and measured ice discharge, (2) ice cores, snow pits, in-situ SMB observations, and (3) remotely sensed bare ice extent from MODerate-resolution Imaging Spectroradiometer (MODIS). Our results reveal that the mean GrIS SMB of all 13 models has been positive between 1980 and 2012 with an average of 340 ± Gt/yr, but has decreased at an average rate of −7.3 Gt/yr2 (with a significance of 96 %), mainly driven by an increase of 8.0 Gt/yr2 (with a significance of 98 %) in meltwater runoff. Spatially, the largest spread among models can be found around the margins of the ice sheet, highlighting the need for accurate representation of the GrIS ablation zone extent and processes driving the surface melt. In addition, a higher density of in-situ SMB observations is required, especially in the south-east accumulation zone, where the model spread can reach 2 mWE/yr due to large discrepancies in modelled snowfall accumulation. Overall, polar regional climate models (RCMs) perform the best compared to observations, in particular for simulating precipitation patterns. However, other simpler and faster models have biases of same order than RCMs with observations and remain then useful tools for long-term simulations. Finally, it is interesting to note that the ensemble mean of the 13 models produces the best estimate of the present day SMB relative to observations, suggesting that biases are not systematic among models.
Vrije Universiteit B... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedLicense: CC BYElectronic Publication Information CenterArticle . 2020Data sources: Electronic Publication Information CenterUniversity of Southern Denmark Research OutputArticle . 2020Data sources: University of Southern Denmark Research OutputCopernicus Publications; The Cryosphere (TC)Other literature type . 2020Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/tc-2019-321&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 7 citations 7 popularity Average influence Average impulse Top 10% Powered by BIP!more_vert Vrije Universiteit B... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedLicense: CC BYElectronic Publication Information CenterArticle . 2020Data sources: Electronic Publication Information CenterUniversity of Southern Denmark Research OutputArticle . 2020Data sources: University of Southern Denmark Research OutputCopernicus Publications; The Cryosphere (TC)Other literature type . 2020Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/tc-2019-321&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2020 France, Spain, Spain, Germany, United Kingdom, Norway, Norway, Argentina, FrancePublisher:Proceedings of the National Academy of Sciences Funded by:EC | EPOCAEC| EPOCAAuthors: Mario Lebrato; Dieter Garbe-Schönberg; Marius N. Müller; Sonia Blanco-Ameijeiras; +40 AuthorsMario Lebrato; Dieter Garbe-Schönberg; Marius N. Müller; Sonia Blanco-Ameijeiras; Richard A. Feely; Laura Lorenzoni; Juan Carlos Molinero; Karen Bremer; Daniel O.B. Jones; Debora Iglesias-Rodriguez; Dana Greeley; Miles D. Lamare; Aurélien Paulmier; Michelle Graco; Joan Enric Cartes; Joana Barcelos e Ramos; Ana de Lara; Ricardo Sanchez-Leal; Paz Jimenez; Flavio Emiliano Paparazzo; Susan E. Hartman; Ulrike Westernströer; Marie Küter; Roberto Benavides; Armindo F. da Silva; Steven Bell; Christopher D. Payne; Sólveig Rósa Ólafsdóttir; Kelly L. Robinson; Liisa M. Jantunen; Alexander Korablev; Richard Webster; Elizabeth M. Jones; Olivier Gilg; Pascal Bailly du Bois; Jacek Bełdowski; Carin J. Ashjian; Nejib Daly Yahia; Benjamin S. Twining; Xue-Gang Chen; Li-Chun Tseng; Jiang-Shiou Hwang; Hans-Uwe Dahms; Andreas Oschlies;handle: 10508/15433 , 10261/320180 , 11336/132247 , 11250/2725741 , 11250/2735695 , 10261/221953
pmc: PMC7486706 , PMC8670508
handle: 10508/15433 , 10261/320180 , 11336/132247 , 11250/2725741 , 11250/2735695 , 10261/221953
pmc: PMC7486706 , PMC8670508
Seawater Mg:Ca and Sr:Ca ratios are biogeochemical parameters reflecting the Earth–ocean–atmosphere dynamic exchange of elements. The ratios’ dependence on the environment and organisms' biology facilitates their application in marine sciences. Here, we present a measured single-laboratory dataset, combined with previous data, to test the assumption of limited seawater Mg:Ca and Sr:Ca variability across marine environments globally. High variability was found in open-ocean upwelling and polar regions, shelves/neritic and river-influenced areas, where seawater Mg:Ca and Sr:Ca ratios range from ∼4.40 to 6.40 mmol:mol and ∼6.95 to 9.80 mmol:mol, respectively. Open-ocean seawater Mg:Ca is semiconservative (∼4.90 to 5.30 mol:mol), while Sr:Ca is more variable and nonconservative (∼7.70 to 8.80 mmol:mol); both ratios are nonconservative in coastal seas. Further, the Ca, Mg, and Sr elemental fluxes are connected to large total alkalinity deviations from International Association for the Physical Sciences of the Oceans (IAPSO) standard values. Because there is significant modern seawater Mg:Ca and Sr:Ca ratios variability across marine environments we cannot absolutely assume that fossil archives using taxa-specific proxies reflect true global seawater chemistry but rather taxa- and process-specific ecosystem variations, reflecting regional conditions. This variability could reconcile secular seawater Mg:Ca and Sr:Ca ratio reconstructions using different taxa and techniques by assuming an error of 1 to 1.50 mol:mol, and 1 to 1.90 mmol:mol, respectively. The modern ratios’ variability is similar to the reconstructed rise over 20 Ma (Neogene Period), nurturing the question of seminonconservative behavior of Ca, Mg, and Sr over modern Earth geological history with an overlooked environmental effect 12 pages, 5 figures, supporting information https://doi.org/10.1073/pnas.1918943117.-- Data Availability. Our published databases are publicly accessible for readers, and they are deposited at the NOAA NCEI at https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0171017.-- Correction for Lebrato et al., Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean; Proceedings of the National Academy of Sciences of the USA 118(49): e2119099118 (2021); doi: 10.1073/pnas.2119099118; http://hdl.handle.net/10261/258054.-- This is Pacific Marine Environmental Laboratory contribution number 5046 This study was developed under a grant from the Federal Ministry of Education and Research to D.G.-S. under contract 03F0722A, by the Kiel Cluster of Excellence “The Future Ocean” (D1067/87) to A.O. and M.L., and by the “European project on Ocean Acidification” (European Community’s Seventh Framework Programme FP7/2007-2013, grant agreement 211384) to A.O. and M.L. Additional funding was provided from project DOSMARES CTM2010-21810-C03-02, by the UK Natural Environment Research Council, to the National Oceanography Centre With the funding support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S), of the Spanish Research Agency (AEI) Peer reviewed
Recolector de Cienci... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2020 . 2023License: CC BY NC NDFull-Text: https://www.pnas.org/content/117/36/22281OceanRep; NERC Open Research Archive; Proceedings of the National Academy of SciencesArticle . 2020 . Peer-reviewedLicense: CC BY NC NDEurope PubMed CentralArticle . 2020Full-Text: http://europepmc.org/articles/PMC7486706Data sources: PubMed CentralRepositorio Institucional Digital del IEOArticle . 2020License: CC BY NC NDData sources: Repositorio Institucional Digital del IEORecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2020 . Peer-reviewedBergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedCONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y TécnicasArticle . 2020License: CC BY NC NDMémoires en Sciences de l'Information et de la CommunicationArticle . 2020Full-Text: https://hal.science/hal-03118124/documentAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1073/pnas.1918943117&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 56 citations 56 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 46visibility views 46 download downloads 162 Powered bymore_vert Recolector de Cienci... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2020 . 2023License: CC BY NC NDFull-Text: https://www.pnas.org/content/117/36/22281OceanRep; NERC Open Research Archive; Proceedings of the National Academy of SciencesArticle . 2020 . Peer-reviewedLicense: CC BY NC NDEurope PubMed CentralArticle . 2020Full-Text: http://europepmc.org/articles/PMC7486706Data sources: PubMed CentralRepositorio Institucional Digital del IEOArticle . 2020License: CC BY NC NDData sources: Repositorio Institucional Digital del IEORecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2020 . Peer-reviewedBergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedCONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y TécnicasArticle . 2020License: CC BY NC NDMémoires en Sciences de l'Information et de la CommunicationArticle . 2020Full-Text: https://hal.science/hal-03118124/documentAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1073/pnas.1918943117&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2018 France, NorwayPublisher:Wiley Funded by:NSF | Collaborative Research: M..., NSF | Collaborative Research: M..., UKRI | Manufacturing Made Smarte...NSF| Collaborative Research: Modeling Hydrothermal Recharge and Outflow in Oceanic Crust Analogs with Sharp Permeability Gradients ,NSF| Collaborative Research: Modeling hydrothermal recharge and outflow in oceanic crust analogs with sharp permeability gradients ,UKRI| Manufacturing Made Smarter NetworkAuthors: Thibaut Barreyre; Jean-Arthur Olive; Timothy J. Crone; Robert A. Sohn;Thibaut Barreyre; Jean-Arthur Olive; Timothy J. Crone; Robert A. Sohn;doi: 10.1002/2017gc007152
handle: 11250/2728423
AbstractThe permeability of the oceanic crust exerts a primary influence on the vigor of hydrothermal circulation at mid‐ocean ridges, but it is a difficult to measure parameter that varies with time, space, and geological setting. Here we develop an analytical model for the poroelastic response of hydrothermal exit‐fluid velocities and temperatures to ocean tidal loading in a two‐layered medium to constrain the discharge zone permeability of each layer. The top layer, corresponding to extrusive lithologies (e.g., seismic layer 2A) overlies a lower permeability layer, corresponding to intrusive lithologies (e.g., layer 2B). We apply the model to three basalt‐hosted hydrothermal fields (i.e., Lucky Strike, Main Endeavour and 9°46′N L‐vent) for which the seismic stratigraphy is well‐established, and for which robust exit‐fluid temperature data are available. We find that the poroelastic response to tidal loading is primarily controlled by layer 2A permeability, which is about 3 orders of magnitude higher for the Lucky Strike site (∼10−10 m2) than the 9°46′N L‐vent site (∼10−13 m2). By contrast, layer 2B permeability does not exert a strong control on the poroelastic response to tidal loading, yet strongly modulates the heat output of hydrothermal discharge zones. Taking these constraints into account, we estimate a plausible range of layer 2B permeability between ∼10−15 m2 and an upper‐bound value of ∼10−14 (9°46′N L‐vent) to ∼10−12 m2 (Lucky Strike). These permeability structures reconcile the short‐term response and long‐term thermal output of hydrothermal sites, and provide new insights into the links between permeability and tectono‐magmatic processes along the global mid‐ocean ridge.
Bergen Open Research... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2018 . Peer-reviewedArchiMer - Institutional Archive of IfremerOther literature type . 2018Data sources: ArchiMer - Institutional Archive of IfremerArchiMer - Institutional Archive of IfremerOther literature type . 2018Data sources: ArchiMer - Institutional Archive of IfremerGeochemistry Geophysics GeosystemsArticle . 2018 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2018Full-Text: https://hal.science/hal-02395037/documentHAL-Inserm; Hal-DiderotArticle . 2018All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2017gc007152&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 13 citations 13 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert Bergen Open Research... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2018 . Peer-reviewedArchiMer - Institutional Archive of IfremerOther literature type . 2018Data sources: ArchiMer - Institutional Archive of IfremerArchiMer - Institutional Archive of IfremerOther literature type . 2018Data sources: ArchiMer - Institutional Archive of IfremerGeochemistry Geophysics GeosystemsArticle . 2018 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2018Full-Text: https://hal.science/hal-02395037/documentHAL-Inserm; Hal-DiderotArticle . 2018All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2017gc007152&type=result"></script>'); --> </script>
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description Publicationkeyboard_double_arrow_right Article 2022 Norway, United States, GermanyPublisher:Springer Science and Business Media LLC Melaniuk, Katarzyna; Sztybor, Kamila; Treude, Tina; Sommer, Stefan; Rasmussen, Tine Lander;AbstractFossil benthic foraminifera are used to trace past methane release linked to climate change. However, it is still debated whether isotopic signatures of living foraminifera from methane-charged sediments reflect incorporation of methane-derived carbon. A deeper understanding of isotopic signatures of living benthic foraminifera from methane-rich environments will help to improve reconstructions of methane release in the past and better predict the impact of future climate warming on methane seepage. Here, we present isotopic signatures (δ13C and δ18O) of foraminiferal calcite together with biogeochemical data from Arctic seep environments from c. 1200 m water depth, Vestnesa Ridge, 79° N, Fram Strait. Lowest δ13C values were recorded in shells of Melonis barleeanus, − 5.2‰ in live specimens and − 6.5‰ in empty shells, from sediments dominated by aerobic (MOx) and anaerobic oxidation of methane (AOM), respectively. Our data indicate that foraminifera actively incorporate methane-derived carbon when living in sediments with moderate seepage activity, while in sediments with high seepage activity the poisonous sulfidic environment leads to death of the foraminifera and an overgrowth of their empty shells by methane-derived authigenic carbonates. We propose that the incorporation of methane-derived carbon in living foraminifera occurs via feeding on methanotrophic bacteria and/or incorporation of ambient dissolved inorganic carbon.
Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2022Full-Text: http://europepmc.org/articles/PMC8782907Data sources: PubMed CentralMunin - Open Research Archive; Norwegian Open Research ArchivesArticle . 2022 . Peer-reviewedeScholarship - University of CaliforniaArticle . 2022Data sources: eScholarship - University of CaliforniaAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1038/s41598-022-05175-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 9 citations 9 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert Europe PubMed Centra... arrow_drop_down Europe PubMed CentralArticle . 2022Full-Text: http://europepmc.org/articles/PMC8782907Data sources: PubMed CentralMunin - Open Research Archive; Norwegian Open Research ArchivesArticle . 2022 . Peer-reviewedeScholarship - University of CaliforniaArticle . 2022Data sources: eScholarship - University of CaliforniaAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1038/s41598-022-05175-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2018 Denmark, Ireland, France, Finland, Germany, France, Norway, United States, Norway, France, France, Germany, France EnglishPublisher:Karlsruhe Publicly fundedFunded by:EC | INTAROS, NSF | METHANE AT THE ZERO CURTA..., NSF | Methane loss from Arctic:... +1 projectsEC| INTAROS ,NSF| METHANE AT THE ZERO CURTAIN ,NSF| Methane loss from Arctic: towards an annual budget of CH4 emissions from tundra ecosystems across a latitudinal gradient ,EC| IMBALANCE-PQiu, C.; Zhu, D.; Ciais, P.; Guenet, B.; Krinner, G.; Peng, S.; Aurela, M.; Bernhofer, C.; Bruemmer, C.; Bret-Harte, S.; Chu, H.; Chen, J.; Desai, A.R.; Dusek, J.; Euskirchen, E.S.; Fortuniak, K.; Flanagan, L.B.; Friborg, T.; Grygoruk, M.; Gogo, S.; Gruenwald, T.; Hansen, B.U.; Holl, D.; Humphreys, E.; Hurkuck, M.; Kiely, G.; Klatt, J.; Kutzbach, L.; Largeron, C.; Laggoun-Defarge, F.; Lund, M.; Lafleur, P.M.; Li, X.; Mammarella, I.; Merbold, L.; Nilsson, M.B.; Olejnik, J.; Ottosson-Lofvenius, M.; Oechel, W.; Parmentier, F.-J.W.; Peichl, M.; Pirk, N.; Peltola, O.; Pawlak, W.; Rasse, D.; Rinne, J.; Shaver, G.; Schmid, H.P.; Sottocornola, M.; Steinbrecher, R.; Sachs, T.; Urbaniak, M.; Zona, D.; Ziemblinska, K.;handle: 11250/2499167 , 10037/13756 , 10468/5590 , 10138/232954 , 10852/64962
Peatlands store substantial amounts of carbon and are vulnerable to climate change. We present a modified version of the Organising Carbon and Hydrology In Dynamic Ecosystems (ORCHIDEE) land surface model for simulating the hydrology, surface energy, and CO2 fluxes of peatlands on daily to annual timescales. The model includes a separate soil tile in each 0.5° grid cell, defined from a global peatland map and identified with peat-specific soil hydraulic properties. Runoff from non-peat vegetation within a grid cell containing a fraction of peat is routed to this peat soil tile, which maintains shallow water tables. The water table position separates oxic from anoxic decomposition. The model was evaluated against eddy-covariance (EC) observations from 30 northern peatland sites, with the maximum rate of carboxylation (Vcmax) being optimized at each site. Regarding short-term day-to-day variations, the model performance was good for gross primary production (GPP) (r2 = 0.76; Nash–Sutcliffe modeling efficiency, MEF = 0.76) and ecosystem respiration (ER, r2 = 0.78, MEF = 0.75), with lesser accuracy for latent heat fluxes (LE, r2 = 0.42, MEF = 0.14) and and net ecosystem CO2 exchange (NEE, r2 = 0.38, MEF = 0.26). Seasonal variations in GPP, ER, NEE, and energy fluxes on monthly scales showed moderate to high r2 values (0.57–0.86). For spatial across-site gradients of annual mean GPP, ER, NEE, and LE, r2 values of 0.93, 0.89, 0.27, and 0.71 were achieved, respectively. Water table (WT) variation was not well predicted (r2 cmax and latitude (temperature), which better reflects the spatial gradients of annual NEE than using an average Vcmax value. Source at https://doi.org/10.5194/gmd-11-497-2018.
Norwegian Open Resea... arrow_drop_down GFZ German Research Centre for GeosciencesArticle . 2018Data sources: GFZ German Research Centre for GeoscienceseScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaGFZ German Research Centre for GeosciencesArticle . 2018Data sources: GFZ German Research Centre for GeosciencesCork Open Research Archive (CORA)Article . 2018License: CC BYData sources: Cork Open Research Archive (CORA)Geoscientific Model Development (GMD)Other literature type . 2018Data sources: Copernicus PublicationsCopenhagen University Research Information SystemArticle . 2018Data sources: Copenhagen University Research Information SystemMunin - Open Research Archive; Norwegian Open Research ArchivesArticle . 2018 . Peer-reviewedNorwegian Open Research Archives; NIBIO BrageArticle . 2018HELDA - Digital Repository of the University of HelsinkiArticle . 2018 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiHAL AMU; Hal-DiderotArticle . 2018All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5445/ir/1000083904&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!visibility 6visibility views 6 download downloads 38 Powered bymore_vert Norwegian Open Resea... arrow_drop_down GFZ German Research Centre for GeosciencesArticle . 2018Data sources: GFZ German Research Centre for GeoscienceseScholarship - University of CaliforniaArticle . 2018Data sources: eScholarship - University of CaliforniaGFZ German Research Centre for GeosciencesArticle . 2018Data sources: GFZ German Research Centre for GeosciencesCork Open Research Archive (CORA)Article . 2018License: CC BYData sources: Cork Open Research Archive (CORA)Geoscientific Model Development (GMD)Other literature type . 2018Data sources: Copernicus PublicationsCopenhagen University Research Information SystemArticle . 2018Data sources: Copenhagen University Research Information SystemMunin - Open Research Archive; Norwegian Open Research ArchivesArticle . 2018 . Peer-reviewedNorwegian Open Research Archives; NIBIO BrageArticle . 2018HELDA - Digital Repository of the University of HelsinkiArticle . 2018 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiHAL AMU; Hal-DiderotArticle . 2018All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5445/ir/1000083904&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2020 United States, United Kingdom, NorwayPublisher:American Geophysical Union (AGU) Funded by:SNSF | The role of Southern Ocea..., NSF | Southern Ocean Carbon and..., SNSF | The role of Southern Ocea...SNSF| The role of Southern Ocean stratification in future ocean CO2 and heat uptake ,NSF| Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) ,SNSF| The role of Southern Ocean stratification in future ocean CO2 and heat uptakeF. Alexander Haumann; Ruth Moorman; Stephen C. Riser; Lars Henrik Smedsrud; Ted Maksym; Annie P. S. Wong; Earle A. Wilson; Robert Drucker; Lynne D. Talley; Kenneth S. Johnson; R.M. Key; Jorge L. Sarmiento;handle: 11250/2761620
<p>In cold polar waters, temperatures sometimes drop below the freezing point, a process referred to as supercooling. However, observational challenges in polar regions limit our understanding of the spatial and temporal extent of this phenomenon. We here provide observational evidence that supercooled waters are much more widespread in the seasonally ice-covered Southern Ocean than previously reported. In 5.8% of all analyzed hydrographic profiles south of 55&#176; S, we find temperatures below the surface freezing point (&#8216;potential&#8217; supercooling), and half of these have temperatures below the local freezing point (&#8216;in-situ&#8217; supercooling). Their occurrence doubles when neglecting measurement uncertainties. We attribute deep coastal-ocean supercooling to melting of Antarctic ice shelves, and surface-induced supercooling in the seasonal sea-ice region to winter-time sea-ice formation. The latter supercooling type can extend down to the permanent pycnocline due to convective sinking plumes&#8212;an important mechanism for vertical tracer transport and water-mass structure in the polar ocean.</p>
Caltech Authors arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedLicense: CC BYAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2020gl090242&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 13 citations 13 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 7visibility views 7 download downloads 5 Powered bymore_vert Caltech Authors arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedLicense: CC BYAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2020gl090242&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type 2020 FrancePublisher:Cold Spring Harbor Laboratory Thomas H A Haverkamp; Julien Lossouarn; Olga Zhaxybayeva; Jie Lyu; Nadège Bienvenu; Claire Geslin; Camilla L. Nesbø;SummaryPhylogenomic analyses of bacteria from the phylum Thermotogota have shown extensive lateral gene transfer with distantly related organisms, particularly with Firmicutes. One likely mechanism of such DNA transfer is viruses. However, to date, only three temperate viruses have been characterized in this phylum, all infecting bacteria from the Marinitoga genus. Here we report 17 proviruses integrated into genomes of bacteria belonging to eight Thermotogota genera and induce viral particle production from one of the proviruses. All except an incomplete provirus from Mesotoga fall into two groups based on sequence similarity, gene synteny and taxonomic classification. Proviruses of Group 1 are found in the genera Geotoga, Kosmotoga, Marinitoga, Thermosipho and Mesoaciditoga and are similar to the previously characterized Marinitoga viruses, while proviruses from Group 2 are distantly related to the Group 1 proviruses, have different genome organization and are found in Petrotoga and Defluviitoga. Genes carried by both groups are closely related to Firmicutes and Firmicutes (pro)viruses in phylogenetic analyses. Moreover, one of the groups show evidence of recent gene exchange and may be capable of infecting cells from both phyla. We hypothesize that viruses are responsible for a large portion of the observed gene flow between Firmicutes and Thermotogota.
Norwegian Open Resea... arrow_drop_down Environmental Microbiology; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedLicense: Wiley Online Library User AgreementEnvironmental Microbiology; ArchiMer - Institutional Archive of IfremerOther literature type . Article . 2021License: CC BY NC NDArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1101/2020.11.07.368316&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routeshybrid 3 citations 3 popularity Average influence Average impulse Average Powered by BIP!more_vert Norwegian Open Resea... arrow_drop_down Environmental Microbiology; Norwegian Open Research ArchivesArticle . 2021 . Peer-reviewedLicense: Wiley Online Library User AgreementEnvironmental Microbiology; ArchiMer - Institutional Archive of IfremerOther literature type . Article . 2021License: CC BY NC NDArchiMer - Institutional Archive of IfremerOther literature type . 2021Data sources: ArchiMer - Institutional Archive of IfremerAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1101/2020.11.07.368316&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2016 NorwayPublisher:University of California Press Funded by:EC | NACLIMEC| NACLIMPacariz, Selma V.; Hátún, Hjálmar; Jacobsen, Jan Arge; Johnson, Clare; Eliasen, Solva; Rey, Francisco;handle: 11250/2433361 , 10852/53073
Abstract The Northeast Atlantic mackerel (Scomber scombrus) stock has increased and expanded its summer feeding migration west- and northwards since 2006, entailing large geopolitical challenges for the countries harvesting this species. A common perspective is that climatic warming opens up new regions for biota in the north. It has also been suggested that the presently large pelagic fish stocks deplete prey resources in the eastern North Atlantic during their summer feeding phase, forcing the stocks west towards the Irminger Sea in their search for food. Here, we suggest that the declining nutrient (silicate) concentrations observed along the northern European continental slope reduce primary and thus secondary production, exacerbating food scarceness in the east and adding to the incentive to migrate westward. The new westward feeding route requires that the fish cross the Iceland Basin, which during the summer season quickly becomes nutrient-depleted and thus might act as a barrier to migration after the spring bloom. Using mackerel and zooplankton abundance data from the International Ecosystem Summer Surveys in the Nordic Seas, we suggest that the oligotrophic waters in the central Iceland Basin force the fish to migrate through a narrow ‘corridor’ along the south Iceland shelf, where nutrients are replenished and both primary and secondary production are higher.
Norwegian Open Resea... arrow_drop_down Elementa: Science of the AnthropoceneArticle . 2016Data sources: Elementa: Science of the AnthropoceneElementa: Science of the Anthropocene; Norwegian Open Research ArchivesArticle . 2016 . Peer-reviewedBrage IMR; Norwegian Open Research ArchivesArticle . 2016All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.12952/journal.elementa.000105&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesgold 16 citations 16 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert Norwegian Open Resea... arrow_drop_down Elementa: Science of the AnthropoceneArticle . 2016Data sources: Elementa: Science of the AnthropoceneElementa: Science of the Anthropocene; Norwegian Open Research ArchivesArticle . 2016 . Peer-reviewedBrage IMR; Norwegian Open Research ArchivesArticle . 2016All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.12952/journal.elementa.000105&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2019 NorwayPublisher:American Geophysical Union (AGU) Authors: Willem G.M. van der Bilt; William J. D'Andrea; Johannes P. Werner; Jostein Bakke;Willem G.M. van der Bilt; William J. D'Andrea; Johannes P. Werner; Jostein Bakke;doi: 10.1029/2019gl084384
handle: 11250/2728059
AbstractArctic climate is uniquely sensitive to ongoing warming. The feedbacks that drive this amplified response remain insufficiently quantified and misrepresented in model scenarios of future warming. Comparison with paleotemperature reconstructions from past warm intervals can help close this gap. The Early Holocene (11.7–8.2 ka BP) is an important target because Arctic temperatures were warmer than today. This study presents centennially resolved summer temperature reconstructions from three Svalbard lakes. We show that Early Holocene temperatures fluctuated between the coldest and warmest extremes of the past 12 ka, exceeding the range of instrumental observations and future projections. Peak warmth occurred ~10 ka BP, with temperatures 7 °C warmer than today due to high radiative forcing and intensified inflow of warm Atlantic waters. Between 9.5 and 8 ka BP, temperatures dropped in response to freshwater fluxes from melting ice. Facing similar mechanisms, our findings may provide insight into the near‐future response of Arctic climate.
Geophysical Research... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2019 . Peer-reviewedLicense: CC BYAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2019gl084384&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 6 citations 6 popularity Top 10% influence Average impulse Average Powered by BIP!more_vert Geophysical Research... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2019 . Peer-reviewedLicense: CC BYAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1029/2019gl084384&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2014 NorwayPublisher:Wiley Funded by:EC | EURO-BASINEC| EURO-BASINSmolina, I.; Kollias, S.; Poortvliet, M.; Nielsen, Torkel Gissel; Lindeque, P.; Castellani, C.; Møller, Eva Friis; Blanco-Bercial, L.; Hoarau, G.;This is the pre-peer reviewed version of the following article: Smolina, I., Kollias, S., Poortvliet, M., Nielsen, T.G., Lindeque, P., Castellani, C., ... Hoarau, G.G. (2014). Genome- and transcriptome-assisted development of nuclear insertion/deletion markers for Calanus species (Copepoda: Calanoida) identification. Molecular Ecology Resources, 14(5), 1072-1079, which has been published in final form at http://dx.doi.org/10.1111/1755-0998.12241. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-820227.html). Submitted version (preprint).
Nord Open Research A... arrow_drop_down Nord Open Research Archive; Norwegian Open Research ArchivesArticle . 2014Molecular Ecology Resources; ZENODOArticle . 2014 . Peer-reviewedLicense: Wiley Online Library User AgreementAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/1755-0998.12241&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 34 citations 34 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!visibility 40visibility views 40 download downloads 125 Powered bymore_vert Nord Open Research A... arrow_drop_down Nord Open Research Archive; Norwegian Open Research ArchivesArticle . 2014Molecular Ecology Resources; ZENODOArticle . 2014 . Peer-reviewedLicense: Wiley Online Library User AgreementAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/1755-0998.12241&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Preprint , Other literature type 2020 Germany, Norway, Belgium, Netherlands, Norway, Denmark, NorwayPublisher:Copernicus GmbH Funded by:EC | PROTECT, NWO | Perturbations of System E...EC| PROTECT ,NWO| Perturbations of System Earth: Reading the Past to Project the Future - A proposal to create the Netherlands Earth System Science Centre (ESSC)Fettweis, Xavier; Hofer, Stefan; Krebs-Kanzow, Uta; Amory, Charles; Aoki, Teruo; Berends, Constantijn J.; Born, Andreas; Box, Jason E.; Delhasse, Alison; Fujita, Koji; Gierz, Paul; Goelzer, Heiko; Hanna, Edward; Hashimoto, Akihiro; Huybrechts, Philippe; Kapsch, Marie-Luise; King, Michalea D.; Kittel, Christoph; Lang, Charlotte; Langen, Peter L.; Lenaerts, Jan T. M.; Liston, Glen E.; Lohmann, Gerrit; Mernild, Sebastian H.; Mikolajewicz, Uwe; Modali, Kameswarrao; Mottram, Ruth H.; Niwano, Masashi; Noël, Brice; Ryan, Jonathan C.; Smith, Amy; Streffing, Jan; Tedesco, Marco; van de Berg, Willem Jan; van den Broeke, Michiel; van de Wal, Roderik S. W.; van Kampenhout, Leo; Wilton, David; Wouters, Bert; Ziemen, Florian; Zolles, Tobias;doi: 10.5194/tc-2019-321
Abstract. The Greenland Ice Sheet (GrIS) mass loss has been accelerating at a rate of about 20 ± 10 Gt/yr2 since the end of the 1990's, with around 60 % of this mass loss directly attributed to enhanced surface meltwater runoff. However, in the climate and glaciology communities, different approaches exist on how to model the different surface mass balance (SMB) components using: (1) complex physically-based climate models which are computationally expensive; (2) intermediate complexity energy balance models; (3) simple and fast positive degree day models which base their inferences on statistical principles and are computationally highly efficient. Additionally, many of these models compute the SMB components based on different spatial and temporal resolutions, with different forcing fields as well as different ice sheet topographies and extents, making inter-comparison difficult. In the GrIS SMB model intercomparison project (GrSMBMIP) we address these issues by forcing each model with the same data (i.e., the ERA-Interim reanalysis) except for two global models for which this forcing is limited to the oceanic conditions, and at the same time by interpolating all modelled results onto a common ice sheet mask at 1 km horizontal resolution for the common period 1980–2012. The SMB outputs from 13 models are then compared over the GrIS to (1) SMB estimates using a combination of gravimetric remote sensing data from GRACE and measured ice discharge, (2) ice cores, snow pits, in-situ SMB observations, and (3) remotely sensed bare ice extent from MODerate-resolution Imaging Spectroradiometer (MODIS). Our results reveal that the mean GrIS SMB of all 13 models has been positive between 1980 and 2012 with an average of 340 ± Gt/yr, but has decreased at an average rate of −7.3 Gt/yr2 (with a significance of 96 %), mainly driven by an increase of 8.0 Gt/yr2 (with a significance of 98 %) in meltwater runoff. Spatially, the largest spread among models can be found around the margins of the ice sheet, highlighting the need for accurate representation of the GrIS ablation zone extent and processes driving the surface melt. In addition, a higher density of in-situ SMB observations is required, especially in the south-east accumulation zone, where the model spread can reach 2 mWE/yr due to large discrepancies in modelled snowfall accumulation. Overall, polar regional climate models (RCMs) perform the best compared to observations, in particular for simulating precipitation patterns. However, other simpler and faster models have biases of same order than RCMs with observations and remain then useful tools for long-term simulations. Finally, it is interesting to note that the ensemble mean of the 13 models produces the best estimate of the present day SMB relative to observations, suggesting that biases are not systematic among models.
Vrije Universiteit B... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedLicense: CC BYElectronic Publication Information CenterArticle . 2020Data sources: Electronic Publication Information CenterUniversity of Southern Denmark Research OutputArticle . 2020Data sources: University of Southern Denmark Research OutputCopernicus Publications; The Cryosphere (TC)Other literature type . 2020Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/tc-2019-321&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 7 citations 7 popularity Average influence Average impulse Top 10% Powered by BIP!more_vert Vrije Universiteit B... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedLicense: CC BYElectronic Publication Information CenterArticle . 2020Data sources: Electronic Publication Information CenterUniversity of Southern Denmark Research OutputArticle . 2020Data sources: University of Southern Denmark Research OutputCopernicus Publications; The Cryosphere (TC)Other literature type . 2020Data sources: Copernicus PublicationsAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.5194/tc-2019-321&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2020 France, Spain, Spain, Germany, United Kingdom, Norway, Norway, Argentina, FrancePublisher:Proceedings of the National Academy of Sciences Funded by:EC | EPOCAEC| EPOCAAuthors: Mario Lebrato; Dieter Garbe-Schönberg; Marius N. Müller; Sonia Blanco-Ameijeiras; +40 AuthorsMario Lebrato; Dieter Garbe-Schönberg; Marius N. Müller; Sonia Blanco-Ameijeiras; Richard A. Feely; Laura Lorenzoni; Juan Carlos Molinero; Karen Bremer; Daniel O.B. Jones; Debora Iglesias-Rodriguez; Dana Greeley; Miles D. Lamare; Aurélien Paulmier; Michelle Graco; Joan Enric Cartes; Joana Barcelos e Ramos; Ana de Lara; Ricardo Sanchez-Leal; Paz Jimenez; Flavio Emiliano Paparazzo; Susan E. Hartman; Ulrike Westernströer; Marie Küter; Roberto Benavides; Armindo F. da Silva; Steven Bell; Christopher D. Payne; Sólveig Rósa Ólafsdóttir; Kelly L. Robinson; Liisa M. Jantunen; Alexander Korablev; Richard Webster; Elizabeth M. Jones; Olivier Gilg; Pascal Bailly du Bois; Jacek Bełdowski; Carin J. Ashjian; Nejib Daly Yahia; Benjamin S. Twining; Xue-Gang Chen; Li-Chun Tseng; Jiang-Shiou Hwang; Hans-Uwe Dahms; Andreas Oschlies;handle: 10508/15433 , 10261/320180 , 11336/132247 , 11250/2725741 , 11250/2735695 , 10261/221953
pmc: PMC7486706 , PMC8670508
handle: 10508/15433 , 10261/320180 , 11336/132247 , 11250/2725741 , 11250/2735695 , 10261/221953
pmc: PMC7486706 , PMC8670508
Seawater Mg:Ca and Sr:Ca ratios are biogeochemical parameters reflecting the Earth–ocean–atmosphere dynamic exchange of elements. The ratios’ dependence on the environment and organisms' biology facilitates their application in marine sciences. Here, we present a measured single-laboratory dataset, combined with previous data, to test the assumption of limited seawater Mg:Ca and Sr:Ca variability across marine environments globally. High variability was found in open-ocean upwelling and polar regions, shelves/neritic and river-influenced areas, where seawater Mg:Ca and Sr:Ca ratios range from ∼4.40 to 6.40 mmol:mol and ∼6.95 to 9.80 mmol:mol, respectively. Open-ocean seawater Mg:Ca is semiconservative (∼4.90 to 5.30 mol:mol), while Sr:Ca is more variable and nonconservative (∼7.70 to 8.80 mmol:mol); both ratios are nonconservative in coastal seas. Further, the Ca, Mg, and Sr elemental fluxes are connected to large total alkalinity deviations from International Association for the Physical Sciences of the Oceans (IAPSO) standard values. Because there is significant modern seawater Mg:Ca and Sr:Ca ratios variability across marine environments we cannot absolutely assume that fossil archives using taxa-specific proxies reflect true global seawater chemistry but rather taxa- and process-specific ecosystem variations, reflecting regional conditions. This variability could reconcile secular seawater Mg:Ca and Sr:Ca ratio reconstructions using different taxa and techniques by assuming an error of 1 to 1.50 mol:mol, and 1 to 1.90 mmol:mol, respectively. The modern ratios’ variability is similar to the reconstructed rise over 20 Ma (Neogene Period), nurturing the question of seminonconservative behavior of Ca, Mg, and Sr over modern Earth geological history with an overlooked environmental effect 12 pages, 5 figures, supporting information https://doi.org/10.1073/pnas.1918943117.-- Data Availability. Our published databases are publicly accessible for readers, and they are deposited at the NOAA NCEI at https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0171017.-- Correction for Lebrato et al., Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean; Proceedings of the National Academy of Sciences of the USA 118(49): e2119099118 (2021); doi: 10.1073/pnas.2119099118; http://hdl.handle.net/10261/258054.-- This is Pacific Marine Environmental Laboratory contribution number 5046 This study was developed under a grant from the Federal Ministry of Education and Research to D.G.-S. under contract 03F0722A, by the Kiel Cluster of Excellence “The Future Ocean” (D1067/87) to A.O. and M.L., and by the “European project on Ocean Acidification” (European Community’s Seventh Framework Programme FP7/2007-2013, grant agreement 211384) to A.O. and M.L. Additional funding was provided from project DOSMARES CTM2010-21810-C03-02, by the UK Natural Environment Research Council, to the National Oceanography Centre With the funding support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S), of the Spanish Research Agency (AEI) Peer reviewed
Recolector de Cienci... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2020 . 2023License: CC BY NC NDFull-Text: https://www.pnas.org/content/117/36/22281OceanRep; NERC Open Research Archive; Proceedings of the National Academy of SciencesArticle . 2020 . Peer-reviewedLicense: CC BY NC NDEurope PubMed CentralArticle . 2020Full-Text: http://europepmc.org/articles/PMC7486706Data sources: PubMed CentralRepositorio Institucional Digital del IEOArticle . 2020License: CC BY NC NDData sources: Repositorio Institucional Digital del IEORecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2020 . Peer-reviewedBergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedCONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y TécnicasArticle . 2020License: CC BY NC NDMémoires en Sciences de l'Information et de la CommunicationArticle . 2020Full-Text: https://hal.science/hal-03118124/documentAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1073/pnas.1918943117&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 56 citations 56 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 46visibility views 46 download downloads 162 Powered bymore_vert Recolector de Cienci... arrow_drop_down Recolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2020 . 2023License: CC BY NC NDFull-Text: https://www.pnas.org/content/117/36/22281OceanRep; NERC Open Research Archive; Proceedings of the National Academy of SciencesArticle . 2020 . Peer-reviewedLicense: CC BY NC NDEurope PubMed CentralArticle . 2020Full-Text: http://europepmc.org/articles/PMC7486706Data sources: PubMed CentralRepositorio Institucional Digital del IEOArticle . 2020License: CC BY NC NDData sources: Repositorio Institucional Digital del IEORecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2020 . Peer-reviewedBergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2020 . Peer-reviewedCONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y TécnicasArticle . 2020License: CC BY NC NDMémoires en Sciences de l'Information et de la CommunicationArticle . 2020Full-Text: https://hal.science/hal-03118124/documentAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1073/pnas.1918943117&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type 2018 France, NorwayPublisher:Wiley Funded by:NSF | Collaborative Research: M..., NSF | Collaborative Research: M..., UKRI | Manufacturing Made Smarte...NSF| Collaborative Research: Modeling Hydrothermal Recharge and Outflow in Oceanic Crust Analogs with Sharp Permeability Gradients ,NSF| Collaborative Research: Modeling hydrothermal recharge and outflow in oceanic crust analogs with sharp permeability gradients ,UKRI| Manufacturing Made Smarter NetworkAuthors: Thibaut Barreyre; Jean-Arthur Olive; Timothy J. Crone; Robert A. Sohn;Thibaut Barreyre; Jean-Arthur Olive; Timothy J. Crone; Robert A. Sohn;doi: 10.1002/2017gc007152
handle: 11250/2728423
AbstractThe permeability of the oceanic crust exerts a primary influence on the vigor of hydrothermal circulation at mid‐ocean ridges, but it is a difficult to measure parameter that varies with time, space, and geological setting. Here we develop an analytical model for the poroelastic response of hydrothermal exit‐fluid velocities and temperatures to ocean tidal loading in a two‐layered medium to constrain the discharge zone permeability of each layer. The top layer, corresponding to extrusive lithologies (e.g., seismic layer 2A) overlies a lower permeability layer, corresponding to intrusive lithologies (e.g., layer 2B). We apply the model to three basalt‐hosted hydrothermal fields (i.e., Lucky Strike, Main Endeavour and 9°46′N L‐vent) for which the seismic stratigraphy is well‐established, and for which robust exit‐fluid temperature data are available. We find that the poroelastic response to tidal loading is primarily controlled by layer 2A permeability, which is about 3 orders of magnitude higher for the Lucky Strike site (∼10−10 m2) than the 9°46′N L‐vent site (∼10−13 m2). By contrast, layer 2B permeability does not exert a strong control on the poroelastic response to tidal loading, yet strongly modulates the heat output of hydrothermal discharge zones. Taking these constraints into account, we estimate a plausible range of layer 2B permeability between ∼10−15 m2 and an upper‐bound value of ∼10−14 (9°46′N L‐vent) to ∼10−12 m2 (Lucky Strike). These permeability structures reconcile the short‐term response and long‐term thermal output of hydrothermal sites, and provide new insights into the links between permeability and tectono‐magmatic processes along the global mid‐ocean ridge.
Bergen Open Research... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2018 . Peer-reviewedArchiMer - Institutional Archive of IfremerOther literature type . 2018Data sources: ArchiMer - Institutional Archive of IfremerArchiMer - Institutional Archive of IfremerOther literature type . 2018Data sources: ArchiMer - Institutional Archive of IfremerGeochemistry Geophysics GeosystemsArticle . 2018 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2018Full-Text: https://hal.science/hal-02395037/documentHAL-Inserm; Hal-DiderotArticle . 2018All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2017gc007152&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 13 citations 13 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert Bergen Open Research... arrow_drop_down Bergen Open Research Archive - UiB; Norwegian Open Research ArchivesArticle . 2018 . Peer-reviewedArchiMer - Institutional Archive of IfremerOther literature type . 2018Data sources: ArchiMer - Institutional Archive of IfremerArchiMer - Institutional Archive of IfremerOther literature type . 2018Data sources: ArchiMer - Institutional Archive of IfremerGeochemistry Geophysics GeosystemsArticle . 2018 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationArticle . 2018Full-Text: https://hal.science/hal-02395037/documentHAL-Inserm; Hal-DiderotArticle . 2018All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2017gc007152&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu